Molding-press.



E. c. WILLIAMS.

MOLDING PRESS.

APPLICATION FILED AUG.24, 1907.

Patented Dec. 14,1909.

4 SHEETS-SHEET l.

I Jizwa/Z6M Z27/zia;

E. 0. WILLIAMS.

MOLDING PRESS.

APPLICATION FILED AUG. 24, 1907. 943,504. Patented De0.14,1909.

4 SHEETS-SHEET 2.

E. c. WILLIAMS, MOLDING PRESS,

APPLICATION FILED AUG.24, 1907. 943,504. Patented Dec. 14,1909.

4 SHEETS-SHEET 3. I

E. G. WILLIAMS.

MOLDING PRESS.

APPLICATION P1L1-".1 AUG. 24, 1907.

Patented Dec. 14, 1909.

4 SHBETSSHEET 4.

UNITED STATES PATENT ()FFIQE.

EDWARD G. WILLIAMS, OF CHICAGO, ILLINOIS.

MOLDING-PRESS.

To all whom it may concern:

Be it known that I, EDWARD O. WILLIAMS, a citizen of the United States,and resident of Chicago, county of Cook, and State of Illinois, haveinvented certain new and useful Improvements in Molding-Presses, ofwhich the following is a specification, and which are illustrated in theaccompanying drawings, forming a part thereof.

The invention relates to molding presses used in the electrotyping art,wherein there is employed a ram or plunger cooperating with a fixedabutment for taking the impression in wax of the form to be reproduced.In machines of this kind the form and matrix are usually mounted upon aplate which slides over a bed-plate to be brought into position forengagement by the ram or plunger, and heretofore the practice has beento manipulate such sliding plate by hand, involving the possibility ofinaccuracy of adjustment due to carelessness and the consequent improperworking of the machine.

The object of the invention is to provide, in machines of thischaracter, power-actuated appliances for carrying the work-supportingplate into and out of the press; and the invention consists of thefeatures here inafter described, and as illustrated in the accompanyingdrawings, in which Figure 1 is a vertical section of a hydraulic press;Fig. 2 is a plan sectional View of the same machine taken over the bed;Fig. 3 is a detail section of the pump chamber of the machine; Fig. 4 isa sectional view of the power cylinder and piston for actuating theplate in a hydraulic machine; Fig. 5 is a detail of the valve forcontrolling the motor shown in Fig. 4 and illustrating the automaticstops for controlling the valve; Fig. 6 is a detail of the valve drawnto a larger scale; Fig. 7 is a detail end View of the bed and carryingplates of the machine; Fig. 8 is a vertical sectional view of atoggle-actuated press; Fig. 9 is a plan section of the same taken abovethe bed-plate and showing the carrying plate actuating mechanism; Fig.10 is a detail vertical transverse section of the machine, showing thedriving shaft for the plate-carrying mechanism; Figs. 11 and 12 aredetails of the clutch shown in Fig. 10.

The hydraulic machine represented in Figs. 1 to 7 comprises the base 15,carrying the abutment block 16, and provided with a Specification ofLetters Patent.

Application filed August 24, 1907.

Patented Dec. 14, 1909. Serial No. 389,998.

hydraulic ram 17 which carries the platen 18. The machine is providedwith a bed plate 19, carried by the head of the ram as a bracket andbeing on a level with the upper surface thereof and which constitutes asupport for the carrier-plate, hereinafter mentioned, and ways uponwhich it travels. The tank 20 contains the liquid (usually oil) used inoperating the ram, and is suitably connected therewith by pipes. Pumps21 and 22 are used for filling the tank 20, and for the purpose ofsupplying increased pressure to the ram 17 during the latter part of itsadvance stroke. There is shown an air pump 23 for maintaining an airpressure within the tank 20.

The parts thus far mentioned being in common use, are not described orillus trated in detail.

The plate for carrying the form is shown at 24 as resting on the bed 19and carrying a form 25 and matrix 26. An arm 27 depends from therearward end of the plate 24, and is connected to the rod 28 of a piston29 which reciprocates in a cylinder 30 located below the bed of themachine and extending through a suitable aperture in the ram 17, bymeans of which it is carried. Fluid, preferably liquid, used inoperating the ram is led from the tank 20 by means of the pipe 31 to thecylinder 30 through the four-way valve 32, mounted in a suitable casing33 carried by the ram, and is discharged from this cylinder through thesame valve by means of the exhaust pipe 34. The valve ports 35, 36, arearranged to register in alternation with the induction and exhaust ports31, 34, and with the pipes 37, 38, leading, respectively, to theopposite ends of the cylinder 30. The valve 32 is controlled by means ofa handle 39, which projects into the path of a pair of stop lugs 40, 41,projecting laterally from the carrying plate 24 at its front and rearedges, respectively. The bed plate 19 is longitudinally slotted, asindicated at 42, to accommodate the arm 27.

When it is desired to advance the carry ing plate the valve handle 39 isdrawn backwardly to bring the pipes 31 and 38 into communication,through the valve port, 35, and the pipes 34, 37, into communication,through the valve port 36, thus causing the piston 29 to move inwardly.

As the plate 24 approaches a proper po-- A motor is again stoppedautomatically by the engagement of the lug T0 with the valve handle 39and the consequent movement of the valve to neutral position. After eachmovement of the plate 24: either to advance or retract it, the valve canbe moved by hand only to provide for the movement of the plate in theopposite direction from that in which it has last traveled.

The press illustrated in Figs. 8 to 12 is driven by mechanical means,the platen 43 being carried by a plunger 44. controlled by toggle levers5L5, 4L6, actuated in any suitable manner. As shown the mechanism foractuating the toggle levers comprises a thrust shaft 47, in threadedengagement with a bracket 49, carried by the base of the ma chine, thisshaft carrying a gear-wheel 50 which intermeshes with and longitudinallyslides upon a pinion 51 in gear connection with a shaft 52, upon whichloosely run a pair of belt pulleys 53, 54, and which may be clutched in.alternation to the shaft 52 by means of the clutch mechanism representedat 55. All of this mechanism, however, being old, it is not describedand illustrated in detail.

A carrying plate 24: of the same form as that shown in connection withthe hydraulic press, is mounted on the bed 19 of the machine, on a levelwith the face of the platen 4:3. From the rear end of the plate 24 isattached a cable 57, or equivalent device, which leads over a shaft 61to the shaft 59 upon which it is wound, which shaft is journaled insuitable boxes carried by the bed plate 19. A similar cable 60, orequivalent device, is also attached-to the plate 24 and is led over apulley 58, journaled to the bed plate 19 at its rearward end, and iswound upon the shaft 59. The two cables 57, 60, are oppositely woundupon the shaft, so that its rotation in one direction will advance andin the opposite direction will retract the plate 24. In order that draftupon the plate may be exactly in the direction of its travel, I preferto use a pair of cables on one side, and to that end show the cable 57as located adjacent one side of the plate and the companion cable 63adjacent the other side, while the cable 60 is located on the medianline of the plate.

The shaft 59 may be driven in any suitable manner. As shown itistubular, and

within it is located a longitudinally movable shipper rod, 64 connectedby means of a pin 65, projecting through longitudinal slots in theshaft, with a clutch cone 66, playing between and alternately engagingthe cup faces of a pair of belt pulleys 67, 68, mounted loosely on theshaft 59, and which may be driven in opposite directions from anysuitable source of power.

The shipper rod is controlled by a hand lever 69, pivoted to a suitablebracket-arm 79 projecting laterally from the bed plate 19, and havingits forked end in engagement with the peripheral channel in a block 71fixed upon a projecting end of the rod 64. A lug 73 projects laterallyfrom the rear corner of the plate 24 for engaging in alternation thebent ends 72, 74, of a pair of levers 75, 76, pivoted to suitablebracketarms 77, 7 8, projecting laterally from the bed-plate l9, andbearing one upon the outer and the other on the inner face of the block71, thereby automatically throwing the clutch 66 to the central positionand stopping the plate at each end of its stroke.

It is obvious that the means for advancing and retracting the carryingplate in either the hydraulic or mechanically-operated machines may beworked out in many ways.

The forms of construction herein shown and described are simple andeffective, and either may be applied to either of the two kinds ofpresses shown. The fluid motor is preferably used in connection with thehydraulic machine, as the power for driving it is immediately available,and for the same reason the belt-driven mechanism is shown as applied tothe mechanically-actuated machine.

I claim as my invention 1. In a molding press, in combination, aplunger, a carrier movable onto and off from the plunger, a fluid motorfor actuating the carrier, a four-way valve for controlling the motor, ahand lever for operating the valve, the carrier being provided withappurtenances for engaging the valve to close it.

2. In a molding press, in combination, a plunger, a carrier movable ontoand off from the plunger, a fluid motor for actuating the carrier, afourway valve for controlling the motor, a hand lever for operating thevalve, and lugs projecting from the carrier to engage the valve to closeit.

3. In a molding press, in combination, a plunger, a carrier movable ontoand off from the plunger, a fluid motor for actuating the carrier, avalve for controlling the motor, and a hand lever for operating thevalve, the carrier being provided with appurtenances for engaging thevalve to close it.

at. In a molding machine, in combination,

a platen, a bed, a carrier movable over the bed and platen,power-actuated means for moving the carrier, and means controllable bythe carrier for automatically disconnecting the moving means.

5. I11 a molding machine, in combination, a platen, a receiving bed inline with the platen, a carrier movable over the bed and platen, meansfor moving the carrier from the bed to the platen and from the platen tothe bed, and a trip mounted on the carrier for throwing the moving meansout of action.

6. In a molding machine, in combination, a platen, a receiving bed inline with the platen, a carrier movable over the bed and platen, meansfor moving the carrier from the bed to the platen and from the platen tothe bed, and a trip mounted on the carrier for throwing the moving meansout of action in both directions of travel.

7. In an apparatus requiring work to be presented and withdrawn, thecombination of a work plate, means to slide the plate into theapparatus, and means controllable by the plate to disconnect thefirst-named means and plate and check the movement of the plate.

8. I11 an apparatus requiring Work to be presented and withdrawn, thecombination of a work plate, means to slide the plate into theapparatus, a handle to operatively connect said means and plate, andmeans controllable by the plate to disconnect the first-named means andplate and check the movement of the plate.

9. In an apparatus requiring work to be presented and withdrawn, thecombination of a Work plate, a lateral support, means to slide the platefrom the support into the apparatus and back again, and meanscontrollable by the plate to disconnect the firstnamed means and plateand check the movement of the plate when it has reached its properposition in the apparatus and also when it has moved back again upon thelateral support.

EDWARD C. WILLIAMS.

l/Vitnesses:

LoUIs K. GILLSON, E. M. KLATOHER.

